Enable sync for the settings from the Extension Settings API.

chrome/browser/ui/webui/ntp/ntp_resource_cache.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/ntp/ntp_resource_cache.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 457 matching lines @@
   new_tab_html_ = base::RefCountedString::TakeString(&full_html);
 }
 
 string16 NTPResourceCache::GetSyncTypeMessage() {
   if (profile_->HasProfileSyncService()) {
     syncable::ModelTypeBitSet unacknowledged =
         profile_->GetProfileSyncService()->GetUnacknowledgedTypes();
 
     // TODO(sync): As we add new data types, we'll probably need some more
     // generic string to display to the user, since the method below won't
     // scale indefinitely (we'd need N*(N+1)/2 different strings to represent

[Ben Olmstead, 2011/08/31 17:36:43]

N*(N+1)/2 should be 2^N-1

     // all the combinations of unacknowledged types). But for now, we just
     // have sessions and typed urls so this is OK.
     if (unacknowledged.test(syncable::SESSIONS) &&
         unacknowledged.test(syncable::TYPED_URLS)) {
       return l10n_util::GetStringUTF16(IDS_SYNC_ADDED_SESSIONS_AND_TYPED_URLS);
     } else if (unacknowledged.test(syncable::SESSIONS)) {
       return l10n_util::GetStringUTF16(IDS_SYNC_ADDED_SESSIONS);
     } else if (unacknowledged.test(syncable::TYPED_URLS)) {
       return l10n_util::GetStringUTF16(IDS_SYNC_ADDED_TYPED_URLS);
+    } else if (unacknowledged.test(syncable::EXTENSION_SETTINGS)) {
+      LOG(ERROR) << "Unacknowledged extension settings.  TODO(kalman): what?";

[not at google - send to devlin, 2011/08/29 09:07:45]

TODO(kalman) indeed.  I presume something more than this will need to be done.

     } else {
       // Shouldn't be possible for any other types to be unacknowledged.
       CHECK(!unacknowledged.any());
     }
   }
   return string16();
 }
 
 void NTPResourceCache::CreateNewTabIncognitoCSS() {
   ui::ThemeProvider* tp = ThemeServiceFactory::GetForProfile(profile_);
@@ skipping 115 matching lines @@
       IDR_NEW_TAB_4_THEME_CSS : IDR_NEW_TAB_THEME_CSS;
   static const base::StringPiece new_tab_theme_css(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           ntp_css_resource_id));
 
   // Create the string from our template and the replacements.
   std::string css_string;
   css_string = ReplaceStringPlaceholders(new_tab_theme_css, subst, NULL);
   new_tab_css_ = base::RefCountedString::TakeString(&css_string);
 }